Garmin satnav updates. Explanation please

  Clapton is God 15:48 15 Oct 2015

I've just bought a Garmin Nuvi 57 satnav. Having also downloaded the Garmin software to my PC it tells me that one of the software updates available is "replace existing map".

Why would I need to replace the existing map - or is this Garmin's rather 'clunky' way of telling me that there are updates available for my map?

  Fruit Bat /\0/\ 17:15 15 Oct 2015

it doesn't amend your existing map, its replacing the old 2013 map with a 2014 map

map files are replaced rather than updated,

  Clapton is God 07:45 16 Oct 2015

Thanks Fruit Bat. I'll 'replace' my map, then!

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